(navigation image)
Home American Libraries | Canadian Libraries | Universal Library | Community Texts | Project Gutenberg | Children's Library | Biodiversity Heritage Library | Additional Collections
Search: Advanced Search
Anonymous User (login or join us)
See other formats

Full text of "Practical Organic Chemistry"



another, especially in the case of homologous compounds, such
as occur in petroleum and coal-tar naphtha. One distillation
suffices only to produce very partial separation of the different
substances, a portion of the less volatile liquid being carried
over in the first distillate, together $iih the more volatile body,




Fi<!. 7^" represents n seri<%s of simple and e.l'fi :iftit fnu'tinnntii)^ colunin1; or still-
heads. A is th.-it uf Vii^reux, in \vli <:h he coii-.trii'tidii1, :ir<- lonued by in-
ileiitin^ llu- tube it-.t-If; i-. is I Jnnpel's :olu nn und cmi-.i-.ts ol" a Imii.' wide tttbc
ille<i with tj;|;i-,s heads ; <, M, and K ar<; cult nue, d.-vi-.rd by N'.MIIIV. and Tl mm-.,
1 e last brim', usci'ul wiicn lai-,j;<- ijitanii ies >f liijuid have to be di-,iillrd. con-
;ins a series ..f ^jass clisrs fused ,,n car.xl, which ran be removed IV, n the
i !>e ; D has a series of" pear-shaped I ulhs blown on the Mem, and K is; wide
i be with a series of constriciions in ea :h of \vhi<:h a small bent i',lass <lr ppin.i;
i In: is suspended in a i',an/e cup.
the temperature gradually rising tliroughont the distillation. In
only*' to effect separation of the several substances, recourse i1
had to the method of fractional distillation.
Tf|e liquid is distilled in a round  flask  over wire-gauze or.
better, in a fusible metal bath, a bit of ^rous pot or a coil <i